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RainGain program - Work Package 2 - by Patrick Willems - KU Leuven
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RainGain program - Work Package 2 - by Patrick Willems - KU Leuven

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Description of the Work Package 2

Description of the Work Package 2

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  • 1.
    • WP2 : Fine-scale rainfall data acquisition and prediction :
    • Objective: develop and implement a system for estimation and forecasting of fine-scale (100m, minutes) rainfall
    • Rainfall estimation : combining data from radars (X & C-band) and rain gauges
    • Rainfall forecasting : combining with numerical weather prediction
    • implement and test for pilot sites (Leuven, Paris, Rotterdam, London)
    • applicable for urban areas of North-West Europe: guidelines, demonstrations, training, …
  • 2.
    • WP2 : Fine-scale rainfall data acquisition and prediction :
    • Applications (see WP3, WP4):
    • Rainfall estimation : enable city water managers to develop reliable urban water strategies, including plans for urban flood prevention and pollution management
    • Rainfall forecasting : allow local city managers to forecast, warn about and control urban pluvial impacts at street level in real time
  • 3. WP2 : Fine-scale rainfall data acquisition and prediction : Actions:
  • 4.
    • WP2 : Fine-scale rainfall data acquisition and prediction :
    • Actions:
    • WP2 A5 & A6: Rainfall estimation
    • A5: Leuven workshop on radar technology, calibration and rainfall estimation (M3)
      • Outcome: recommended methods for fine-scale rainfall estimation
    • A6: rainfall estimation in pilot sites
      • Outcomes: fine-scale rainfall estimates for recent storms in pilot sites + comparison with traditional rainfall estimates (without radar)
  • 5.
    • WP2 : Fine-scale rainfall data acquisition and prediction :
    • Actions:
    • WP2 A5 & A6: Rainfall estimation
    • Subtopics addressed:
    • Radar calibration and adjustment based on rain gauge data
    • Different calibration/adjustment methods
    • Comparison & integration of fine-scale (X-band, city scale; super- resolution C-band) with rain gauge and coarser (NWE-scale) C-band radar data
    • Rainfall estimation error/uncertainty analysis
    • Interfacing with the applications in WP3 & WP4
  • 6.
    • WP2 : Fine-scale rainfall data acquisition and prediction :
    • Actions:
    • WP2 A7 & A8: Rainfall forecasting
    • A7: London workshop on rainfall forecasting (M6)
      • Outcome: recommended methods for fine-scale rainfall forecasting
    • A8: implementation for pilot sites
      • Outcomes: operational system for fine-scale rainfall forecasting in pilot sites + results for min. 10 extreme storms
  • 7.
    • WP2 : Fine-scale rainfall data acquisition and prediction :
    • Actions:
    • WP2 A7 & A8: Rainfall forecasting (short-term forecasting = nowcasting)
    • Subtopics addressed:
    • Combination of (fine and coarse scale) radar data with Numerical Weather Prediction (provided by national meteo services)
    • Use of lightning detection data
    • Advective-statistical forecast model
    • Spatial and temporal downscaling
    • Error/uncertainty estimation in function of forecast lead time / probabilistic forecasts
    • Interfacing with the applications in WP3 & WP4
  • 8.
    • WP2 : Fine-scale rainfall data acquisition and prediction :
    • Actions:
    • WP2 A9: Guidelines
      • Outcome: reference and user’s manuals on developed technologies for rainfall estimation and forecasting
      • Training and dissemination during National Observer Meetings
  • 9.
    • WP2: Fine-scale rainfall data acquisition and prediction :
    • Timing:
      • WP2 A5: rainfall estimation workshop Leuven: autumn 2012
      • WP2 A6: autumn 2012 – spring 2014: all pilot sites
      • WP2 A7: rainfall forecasting workshop London: spring 2014
      • WP2 A8: spring 2014 – spring 2015: all pilot sites
      • WP2 A9: once a year: National Observer Meetings
  • 10.
    • WP2: Fine-scale rainfall data acquisition and prediction :
    • Workshop participants:
      • workshop Leuven: about 20 radar experts
      • workshop London: about 20 radar + NWP experts
      • local workshops pilot sites: about 20 end users: city flood managers, water managers, consultants and industrial partners
  • 11. Leuven case
    • Aquafin &
    • K.U.Leuven
    • X-band radar installed
    • since 2008
    • City LAWR (DHI)
    • Site selection based on clutter tests
    • Experience with calibration
  • 12. Other fine-scale radar projects in Europe
    • Denmark :
    • X-band LAWR radar Aalborg
    • Comparison of different calibration procedures (incl. dynamic calibration)
    • Impact on urban drainage
  • 13. Other fine-scale radar projects in Europe
    • France – Lyon :
    • C-band radar located in the close vicinity
    • Rain gauges vs. radar
    • Study of intense rain cells
    • Impact on urban drainage
  • 14. Other fine-scale radar projects in Europe
    • France – Southern Alps : ( RHyTMME project)
    • Local X band radar network (4 radars, 2 operational)
    • Installed in mountainous area prone to orographically-induced flooding
    • Gap filling function in ARAMIS (C and S band network)
  • 15. Other fine-scale radar projects outside Europe
    • USA :
    • CASA ( Collaborative Adaptive Sensing of the Atmosphere )
      • Local X band network (moving from Oklahoma “Tornado Alley” to Fort Dallas in 2012)
  • 16. Other fine-scale radar projects in Europe
    • USA :
    • Comparison polarimetric X-band vs. S-band
    • Impact on catchment runoff
  • 17. Other fine-scale radar projects outside Europe
    • Japan :
    • X -NET
    • Nationwide X-band Polarimetric Radar Network (26 radars cover about 80% of the total population)
  • 18.  
  • 19. Leuven case BELGIUM
    • Contributors from Belgium:
    • Patrick Willems, K.U.Leuven
    • Johan Van Assel, Aquafin
    • Maarten Reyniers, Laurent Delobbe,
    • Royal Meteorological Institute of Belgium
  • 20. Leuven case City of Leuven: urban drainage system of the villages Herent, Wisele & Wijgmaal
  • 21. Leuven case City of Leuven: urban drainage system of the villages Herent, Wisele & Wijgmaal
    • Area: 9.13 km 2
    • # people: 16,100
    • 9 tipping bucket rain gauges
    • In-sewer measurements:
      • Water level + velocity in 2 pipes
      • Water level at 3 overflows
      • + water level in river
  • 22. Leuven case Tipping bucket rain gauges: calibration
  • 23. Leuven case Tipping bucket rain gauges: correction wind influence: TBR 2 TBR 1
  • 24. Leuven case X-band radar installed since 2008: City LAWR (DHI)
  • 25. Leuven case Provinciehuis RWZI Bierbeek Res. Riverside Ecowerf Micro Radar Clutter tests
  • 26. Leuven case Beam cut-off
  • 27. Leuven case X-band radar image
  • 28. Leuven case X-band radar calibration
  • 29. Leuven case X-band radar calibration G (mm/h)
  • 30. Leuven case
    • SP C-band radars
      • Wideumont (RMI)
      • Zaventem (Belgocontrol)
    • DP C-band radar:
      • from beginning 2012 in Jabbeke
    (Delobbe et al., 2006)

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